Answer: 6.022 x 1023 atoms.
- A 1 atom in typical laboratory settings
- B 4 atoms under usual circumstances
- C 6.022 x 1023 atoms
- D 22.4 atoms according to most researchers
Correct answer: C. 6.022 x 1023 atoms
Explanation: Helium is monoatomic, and 1 mole of helium contains 6.022 x 1023 helium atoms.
Mass connects to moles via molar mass, and moles connect to particle count via Avogadro's number or to gas volume via the 22.4 L/mol rule at STP.
Concept context
The mole is chemistry's counting unit. Learn to relate mass, volume, and number of particles using Avogadro's number and molar mass, the foundation of all stoichiometry and reaction calculations.